A Federation weapons invented some time between the 24th and 29th centuries. The weapon distorted spacetime around the target, stressing it to the point where it could no longer hold cohesion. A temporal disrupter small enough to fit in the hand could utterly destroy an Intrepid class starship, and in 2375 Captain Braxton used one to destroy Voyager. Fortunately the weapon was disarmed before it could be activated using temporal technology.4

An ancient Klingon knife which dates back to the time of Kahless, and is believed to be stained with his blood. The Knife of Kirom is held on the Klingon homeworld in a sacred vault, from which nobody is allowed to remove it. Nevertheless, it was removed by Gowron in 2369 and taken to Boreth. Gowron hoped to compare the DNA on the blade to that of the recently resurrected Kahless, to prove that he was a fraud. In fact, the knife showed that the blood was a match for Kahless. This subsequently proved to be because Kahless was a clone of the original.8

A device which was capable of influencing the brain activity of a victim. Thought makers comprised a pair of devices, one which was placed near the victim and one which was used to control it from a distance. It was illegal to own or use thought makers within the Ferengi Alliance. Nevertheless, in 2364 DaiMon Bok used a thought maker in an attempt to discredit and ultimately kill Captain Picard. Purchasing the thought maker cost Bok his entire life's profit.14

Weapon developed by Starfleet in an alternate timeline at some point between 2377 and 2404. The torpedoes were massively effective against Borg cubes. A future version of Captain Janeway equipped Voyager with transphasic torpedoes in 2377, enabling the ship to reach a Borg transwarp hub in an attempt to return home.19